Welded rear diff

wiltshire landyman · Apr 29, 2013

Speaking to a mate of mine regarding welding a rear diff up, what he's done to overcome the problems it incurred on the road he takes out a half shaft and puts in one that has 6" removed for when driving on the road and then when he gets to the pay n play he puts the full length shaft bk in

Any thoughts as to whether this is good or bad and reasons why

200tdi ayre · Apr 29, 2013

I wouldn't use a welded diff, ruins your turning circle and puts more pressure on your half shafts.

DiscoPol · Apr 29, 2013

200tdi ayre said:
I wouldn't use a welded diff, ruins your turning circle and puts more pressure on your half shafts.

but that is why he is talking about the shortened half shaft, to alleviate the problems you mentioned.

personally i have a detroit tru-loc in the back and it always drive on wheel at prop speed allowing the other to turn faster so tight corners and road use arent so bad, but you can still feel it sometimes pushing the arse when all you want to do is turn the corner.

as a cheap way round the locking diff thing i reckon it could be ok, but i think i would want to carry a full tool kit and some fresh shafts and a spare diff if i was running one, that paranoia would kill me, how much road use are you talking about WLM?

200tdi ayre · Apr 29, 2013

DiscoPol said:
but that is why he is talking about the shortened half shaft, to alleviate the problems you mentioned.

personally i have a detroit tru-loc in the back and it always drive on wheel at prop speed allowing the other to turn faster so tight corners and road use arent so bad, but you can still feel it sometimes pushing the arse when all you want to do is turn the corner.

as a cheap way round the locking diff thing i reckon it could be ok, but i think i would want to carry a full tool kit and some fresh shafts and a spare diff if i was running one, that paranoia would kill me, how much road use are you talking about WLM?

Yeah I got the shortened shaft for road use but but still offroad it will ruin the turning circle and much more likely to break shafts

wiltshire landyman · Apr 29, 2013

The road use is purely to and from sites lanes etc,

wiltshire landyman · Apr 29, 2013

200tdi ayre said:
Yeah I got the shortened shaft for road use but but still offroad it will ruin the turning circle and much more likely to break shafts

Why would it break shafts ?

200tdi ayre · Apr 29, 2013

wiltshire landyman said:
Why would it break shafts ?

More traction = more force on shafts, when you go around corners your wheels will want to turn at different speeds but the locked diff makes them turn at the same speed, with your big grippy tyres there's alot of force going through the shafts that wouldn't be there with an open diff

DiscoPol · Apr 29, 2013

wiltshire landyman said:
Why would it break shafts ?

that depends on how much traction your tyres are getting surely?

wiltshire landyman · Apr 29, 2013

200tdi ayre said:
More traction = more force on shafts, when you go around corners your wheels will want to turn at different speeds but the locked diff makes them turn at the same speed, with your big grippy tyres there's alot of force going through the shafts that wouldn't be there with an open diff

DiscoPol said:
that depends on how much traction your tyres are getting surely?

My tyres are the best ive ever had but as we all know with the standard setup offroad at best you've got 2wd on opposite corners most of the time when stuck with the welded diff you get at least 3wd

Qs is can I live with the possibility of breaking shafts? More than breaking diffs?

DiscoPol · Apr 29, 2013

wiltshire landyman said:
My tyres are the best ive ever had but as we all know with the standard setup offroad at best you've got 2wd on opposite corners most of the time when stuck with the welded diff you get at least 3wd

Qs is can I live with the possibility of breaking shafts? More than breaking diffs?

but again the question is, just how much other collateral damage is done if you twist a shaft till it breaks and then leave bits in the diff?

Im not saying its a bad idea, just playing devils advocate

wiltshire landyman · Apr 29, 2013

DiscoPol said:
but again the question is, just how much other collateral damage is done if you twist a shaft till it breaks and then leave bits in the diff?

Im not saying its a bad idea, just playing devils advocate

I've done plenty of diffs in the past its just part of the downsides of the hobby, it's my toy and not a daily driver, if I was to do any significant road miles I would put a standard diff in

200tdi ayre · Apr 29, 2013

wiltshire landyman said:
My tyres are the best ive ever had but as we all know with the standard setup offroad at best you've got 2wd on opposite corners most of the time when stuck with the welded diff you get at least 3wd

Qs is can I live with the possibility of breaking shafts? More than breaking diffs?

Broken shafts can be a bigger pain than broken diffs, one of my mates twisted a shaft and couldn't get it out, in the end the only way to get the shaft out was to attach another car to it, floor it an rip it out bouncing his Rangie sideways, although te extra traction would be a benefit. Why not a locking diff and unlock when not needed ?

DiscoPol · Apr 29, 2013

wiltshire landyman said:
I've done plenty of diffs in the past its just part of the downsides of the hobby, it's my toy and not a daily driver, if I was to do any significant road miles I would put a standard diff in

get welding then

trax · Apr 29, 2013

200tdi ayre said:
Broken shafts can be a bigger pain than broken diffs, one of my mates twisted a shaft and couldn't get it out, in the end the only way to get the shaft out was to attach another car to it, floor it an rip it out bouncing his Rangie sideways, although te extra traction would be a benefit. Why not a locking diff and unlock when not needed ?

is there a higher chance of snapping a shaft like this compared to a locking diff? if not then it's a non issue

Dr_evil · Apr 29, 2013

could you not just fit a locking diff

DiscoPol · Apr 29, 2013

Dr_evil said:
could you not just fit a locking diff

afternoon moneybags

200tdi ayre · Apr 29, 2013

trax said:
is there a higher chance of snapping a shaft like this compared to a locking diff? if not then it's a non issue

Yes as every time you corner it will put stress on te shafts which is made even worse by the awesome big tyres, a locking diff would eliviate this as you unlock around corners and when not needed so much less likely to break,

Dr_evil · Apr 29, 2013

DiscoPol said:
afternoon moneybags

If he'd stop buying winches he could buy a diff

trax · Apr 29, 2013

200tdi ayre said:
Yes as every time you corner it will put stress on te shafts which is made even worse by the awesome big tyres, a locking diff would eliviate this as you unlock around corners and when not needed so much less likely to break,

oh right.. i hadn't looked into fitting a locking diff before. I had presumed you stuck it on when it is about to get slippy and just left it on; not turn it on and off all the time

DiscoPol · Apr 29, 2013

Dr_evil said:
If he'd stop buying winches he could buy a diff

and possibly not need the winches so much, winches are for pussies that cant drive through in the first place, prevention is much better than cure

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